Asteroids 2867 Steins and 21 Lutetia: surface composition from far infrared observations with the Spitzer space telescope
M. A. Barucci, S. Fornasier, E. Dotto, P. L. Lamy, L. Jorda, O. Groussin, J. R. Brucato, J. Carvano, A. Alvarez-Candal, D. Cruikshank and M. Fulchignoni
